CN108146269B - Method for performing high-low temperature charging and thermal management on electric vehicle battery - Google Patents
Method for performing high-low temperature charging and thermal management on electric vehicle battery Download PDFInfo
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- CN108146269B CN108146269B CN201711396058.2A CN201711396058A CN108146269B CN 108146269 B CN108146269 B CN 108146269B CN 201711396058 A CN201711396058 A CN 201711396058A CN 108146269 B CN108146269 B CN 108146269B
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims description 18
- 239000013589 supplement Substances 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 7
- 230000007958 sleep Effects 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 32
- 238000007726 management method Methods 0.000 description 28
- 239000003507 refrigerant Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 3
- 230000002528 anti-freeze Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/14—Conductive energy transfer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/27—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by heating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention relates to a high-low temperature charging and heat management system for batteries of electric vehicles, which comprises a battery heater, a plate exchanger, a battery water pump, a vehicle auxiliary water tank, a compressor, a condenser, an electromagnetic valve, a thermal expansion valve, an evaporator and an electronic expansion valve, wherein the vehicle auxiliary water tank, the battery water pump, the plate exchanger and the battery heater are sequentially connected, the compressor, the condenser, the electronic expansion valve and the plate exchanger are sequentially connected, the plate exchanger is connected with the compressor, the vehicle auxiliary water tank, the battery water pump and the plate exchanger are sequentially connected, the compressor, the condenser, the electromagnetic valve, the thermal expansion valve and the evaporator are sequentially connected, and the evaporator is connected with the. The invention can directly realize high-low temperature charging management and thermal management of the power battery on the electric automobile, can keep the temperature of the power battery at the most appropriate value in the charging process and after the charging is finished, keeps the performance of the power battery at the optimal state, prolongs the service life of the power battery, has good user experience, and can well meet the requirements of practical application.
Description
Technical Field
The invention belongs to the technical field of electric vehicle battery charging devices, and particularly relates to a method for performing high-low temperature charging and thermal management on an electric vehicle battery.
Background
Global worry about future energy crisis and environmental awareness of various countries are enhanced, rapid development of new energy automobile industry is promoted, electric automobiles are widely applied, explosive growth of the electric automobiles in China is also met in the last year, and the electric automobiles are applied in a large scale in many fields such as public transport, leasing, logistics, passenger cars and the like.
The more applications of a new life mean the more problems will arise, and electric vehicles are no exception. When cold winter comes, the electric automobile using the lithium ion battery as the power source has difficulty in use. Firstly, after the electric automobile runs, the temperature of the battery is higher, and the automobile is charged by large current immediately after the electric automobile is stopped, so that the temperature of the battery is increased again, the service life of the battery is damaged when the temperature of the battery reaches a certain level, and the safety risk is seriously even caused; secondly, in the extremely cold area in the north, the electric vehicle is placed in an extremely low temperature environment after being fully charged, when the standing time is long, for example, the electric vehicle is placed in the morning after being charged at night, the temperature of the power battery of the electric vehicle is already reduced to a lower temperature (below-5 ℃), when the electric vehicle is started next time, due to the fact that the discharging performance of the lithium battery is reduced at the extremely low temperature, the phenomenon that the power is insufficient or the electric vehicle cannot be started occurs, the electric vehicle cannot be used, and user experience is poor.
In the prior art, except that a charger is adopted to control charging power, some electric vehicles in the current market can integrate a thermal management system on the vehicle, and during charging, thermal management can be started to heat/cool the battery. However, after the charging is completed and the vehicle is left standing for a long time, the vehicle still drops quickly along with the ambient temperature, and when a user uses the vehicle, the problems are caused, and the user experience is poor. The charging and heat management device in the prior art is unscientific in structural design and cannot reasonably control the temperature of the battery in the charging process and after charging is finished.
Disclosure of Invention
In view of the above problems in the prior art, an object of the present invention is to provide a method for charging and thermally managing batteries of an electric vehicle at high and low temperatures, which can avoid the above technical drawbacks.
In order to achieve the above object, the present invention provides the following technical solutions:
the utility model provides an electric automobile battery high low temperature charges and thermal management system, includes that battery heater, board trade, battery water pump, vehicle expansion tank, compressor, condenser, solenoid valve, thermal expansion valve, evaporimeter and electronic expansion valve, wherein: the vehicle auxiliary water tank, the battery water pump, the plate exchanger and the battery heater are sequentially connected, the compressor, the condenser, the electronic expansion valve and the plate exchanger are sequentially connected, the plate exchanger is connected with the compressor, the vehicle auxiliary water tank, the battery water pump and the plate exchanger are sequentially connected, the compressor, the condenser, the electromagnetic valve, the thermal expansion valve and the evaporator are sequentially connected, and the evaporator is connected with the compressor.
Further, the system further comprises a charger, a BMS, a charger and a vehicle-mounted terminal, wherein the charger and the BMS are both connected with the power battery, the charger is respectively connected with the charger and the BMS, a charging guide circuit is connected between the charger and the BMS, and the vehicle-mounted terminal is connected with the BMS.
Furthermore, a water inlet and a water outlet of the power battery are both provided with temperature sensors.
Further, a liquid level sensor is arranged in the auxiliary water tank of the vehicle.
Further, the plate exchange water outlet is provided with a temperature sensor.
Further, a vehicle auxiliary water tank, a battery water pump, a plate exchanger, a battery heater, an electric automobile battery and the vehicle auxiliary water tank are sequentially connected to form a thermal management heating loop, and a medium in the thermal management heating loop is an automobile antifreeze solution.
Furthermore, the medium in a loop formed by sequentially connecting the compressor, the condenser, the electronic expansion valve, the plate exchanger and the compressor is a refrigerant.
Furthermore, a refrigerant is used as a medium in a loop formed by sequentially connecting the compressor, the condenser, the electromagnetic valve, the thermostatic expansion valve, the evaporator and the compressor.
A method for high and low temperature charging and thermal management of an electric vehicle battery comprises the following steps:
when the vehicle stops running, if the temperature of the power battery is higher than T2, after charging is started, the BMS calculates the proper charging power of the power battery and informs a charger to output the charging power in real time, and meanwhile, the BMS controls the system to work to cool the power battery;
after the power battery is fully charged, the BMS patrols the temperature of the power battery, and when the temperature of the power battery is reduced to be lower than T1, the BMS starts the heater to start heating;
after the power battery is fully charged, if the temperature of the power battery is higher than T2, the BMS control system cools the power battery;
when the vehicle stops running, if the temperature of the power battery is lower than T1, after the charging is started, the BMS calculates the proper charging power of the power battery and informs a charger to output the charging power in real time, and meanwhile, the BMS controls the system to work to heat the power battery, so that the temperature of the battery quickly reaches the optimal performance temperature;
after the power battery is fully charged, the BMS patrols the temperature of the power battery, and when the temperature of the power battery is reduced to be lower than T1, the BMS starts the heater to start heating;
after the power battery is fully charged, if the temperature of the power battery is higher than T2, the BMS control system starts to cool the power battery, and a charger is started to supplement power for the power battery;
wherein, (T1, T2) is the optimum temperature range for power battery performance.
Further, the method specifically comprises the following steps:
when the vehicle stops running, the BMS calculates the proper charging power of the power battery according to the most proper charging power curve at different temperatures, and informs a charger to output the charging power in real time through a charging guide circuit and a charging CAN network; the whole vehicle is in a dormant state after full power to reduce power consumption, and the BMS and the vehicle-mounted terminal are in a low power consumption mode;
after the power battery is fully charged, the BMS patrols the temperature of the power battery, when the temperature of the power battery is reduced to be lower than T1, the BMS starts the heater to start heating, and when the heating power consumption reaches 5% of the capacity of the power battery, the BMS starts the charger to supplement the power battery;
after the power battery is fully charged, if the temperature of the power battery is higher than T2, the BMS controls the whole system to cool the power battery, and a charger is started to supplement power for the power battery;
when the vehicle stops running, if the temperature of the power battery is smaller than T1, after charging is started, the BMS calculates the proper charging power of the power battery according to the most proper charging power curve at different temperatures, and informs the charger to output the charging power in real time through a charging guide circuit and a charging CAN network, meanwhile, the BMS control system works to heat the power battery, so that the temperature of the battery quickly reaches the optimal performance temperature, and in the process of temperature rise, the BMS adjusts the charging power in real time according to a preset curve and informs the charger to output the charging power in real time, so that the battery is quickly charged, and the whole vehicle sleeps after the battery is fully charged, so that the power consumption is reduced, and the BMS and the vehicle;
after the power battery is fully charged, the BMS patrols the temperature of the power battery, when the temperature of the power battery is reduced to be lower than T1, the BMS starts the heater to start heating, and when the heating power consumption reaches 5% of the capacity of the power battery, the BMS starts the charger to supplement the power battery;
after the power battery is fully charged, if the temperature of the power battery is higher than T2, the BMS control system starts to cool the power battery, and starts a charger to supplement power for the power battery.
The high-low temperature charging and heat management system for the battery of the electric automobile, provided by the invention, has a scientific and reasonable structural design, can directly realize high-low temperature charging management and heat management on the power battery on the electric automobile, can keep the temperature of the power battery at the most appropriate value in the charging process and after the charging is finished, keeps the performance of the power battery at the best state, prolongs the service life of the power battery, has good user experience, and can well meet the requirements of practical application.
Drawings
Fig. 1 is a schematic structural diagram of the system of the invention connected with a power battery.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, a high-low temperature charging and heat management system for an electric vehicle battery comprises a battery heater (used as a heating source), a panel exchanger, a battery water pump, a vehicle auxiliary water tank (used for containing heat management liquid), a compressor (used as a cooling source), a condenser, an electromagnetic valve, a thermal expansion valve, an evaporator and an electronic expansion valve, and is used for performing high-low temperature charging and heat management on a power battery (namely, an electric vehicle battery) of an electric vehicle; the system is connected to a power battery to form a plurality of loops, wherein:
the vehicle auxiliary water tank, the battery water pump, the plate exchanger and the battery heater are sequentially connected, and the vehicle auxiliary water tank and the battery heater are respectively connected with the power battery to form a heat management heating loop, wherein a medium in the heat management heating loop is an automotive antifreeze solution; the water inlet and the water outlet of the power battery are both provided with temperature sensors; a liquid level sensor is arranged in the auxiliary water tank of the vehicle; a temperature sensor is arranged at the water outlet of the plate exchange;
the compressor, the condenser, the electronic expansion valve and the plate exchanger are sequentially connected, and the plate exchanger is connected with the compressor to form a heat management cooling loop, wherein a medium in the heat management cooling loop is a refrigerant;
the vehicle auxiliary water tank, the battery water pump and the plate exchanger are sequentially connected, and the plate exchanger and the vehicle auxiliary water tank are respectively connected with the power battery to form a water path loop;
the water path loop and the heat management cooling loop exchange heat between the anti-freezing liquid for the automobile and a refrigerant through plates to take away heat;
the compressor, the condenser, the electromagnetic valve, the thermostatic expansion valve and the evaporator are sequentially connected, and the evaporator is connected with the compressor to form an air conditioning loop in the vehicle, wherein a medium in the air conditioning loop is a refrigerant;
the heat management cooling loop and the air conditioning loop in the car share a compressor as a cold source and are controlled by respective electromagnetic valves.
The system further comprises a charger, a BMS (Battery management system ), a charger and a vehicle-mounted terminal, wherein the charger and the BMS are connected with the power BATTERY, the charger is respectively connected with the charger and the BMS, a charging guide circuit is connected between the charger and the BMS, and the vehicle-mounted terminal is connected with the BMS. Data exchange between the charger and the BMS is enabled. The user terminal can be connected to the charger, and the user terminal can exchange data with the vehicle-mounted terminal.
The automobile manufacturer sets an optimal temperature range (T1, T2) according to the performance of the selected power battery, and the most appropriate charging power curve of the power battery at different temperatures.
A high-low temperature charging and heat management method for an electric vehicle battery comprises the following steps:
1) when the vehicle stops running, if the temperature T of the power battery is larger than T2, after a user inserts a charging gun for charging, the expected vehicle using time can be set through a user terminal, a charger and a BMS (battery management system) can be connected through a vehicle-mounted terminal, and charging information is displayed in real time; meanwhile, the BMS calculates the proper charging power of the power battery according to the most proper charging power curve at different temperatures, and informs a charger to output the charging power in real time through a charging guide circuit and a charging CAN network, and meanwhile, the BMS controls the system to work to cool the power battery so that the temperature of the power battery rapidly reaches the optimal performance temperature; the whole vehicle is in a dormant state after full power to reduce power consumption, and the BMS and the vehicle-mounted terminal are in a low power consumption mode;
after the power battery is fully charged, if the current time does not reach the user-set service time, the BMS patrols the temperature of the power battery through fixed time, when the temperature of the power battery is reduced to be lower than T1, the BMS starts a heater to heat, and when the heating power consumption reaches 5% of the capacity of the power battery, the BMS starts a charger to supplement the power battery; controlling the charging time to be delta t (vehicle using time-current time), wherein the charging capacity is 5% of the capacity of the power battery, calculating to obtain charging power P1, and adding the power consumption power P2 of the heater to obtain total charging power P, so that the vehicle can be just fully charged when the vehicle using time is up, and the temperature of the battery is maintained within a proper temperature range;
after the power battery is fully charged, if the temperature of the power battery is higher than T2, the BMS controls the whole system to cool the power battery, and a charger is started to supplement power for the power battery.
2) When the vehicle stops running, if the temperature T of the power battery is less than T1, after a user inserts a charging gun for charging, the expected vehicle using time can be set through the user terminal, and the vehicle-mounted terminal can be connected with a charger and a BMS (battery management system) to display charging information in real time; meanwhile, the BMS calculates the proper charging power of the power battery according to the most proper charging power curve at different temperatures, and informs a charger to output the charging power in real time through a charging guide circuit and a charging CAN network, and meanwhile, the BMS controls the system to work to heat the power battery, so that the temperature of the battery quickly reaches the optimal performance temperature;
after the power battery is fully charged, if the current time does not reach the user-set service time, the BMS patrols the temperature of the power battery through fixed time, when the temperature of the power battery is reduced to be lower than T1, the BMS starts a heater to heat, and when the heating power consumption reaches 5% of the capacity of the power battery, the BMS starts a charger to supplement the power battery; controlling the charging time to be delta t (vehicle using time-current time), wherein the charging capacity is 5% of the battery capacity, calculating to obtain charging power P1, and adding the power consumption power P2 of the heater to obtain total charging power P, so that the vehicle using time can be just fully charged, and the battery temperature is maintained within a proper temperature range;
after the power battery is fully charged, if the temperature of the power battery is higher than T2, the BMS controls the system to start cooling the power battery, and starts a charger to supplement power for the power battery.
The high-low temperature charging and heat management system for the battery of the electric automobile, provided by the invention, has a scientific and reasonable structural design, can directly realize high-low temperature charging management and heat management on the power battery on the electric automobile, can keep the temperature of the power battery at the most appropriate value in the charging process and after the charging is finished, keeps the performance of the power battery at the best state, prolongs the service life of the power battery, has good user experience, and can well meet the requirements of practical application.
The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (1)
1. A method for high-low temperature charging and thermal management of an electric vehicle battery is characterized by comprising the following steps:
when the vehicle stops running, if the temperature of the power battery is higher than T2, after charging is started, the BMS calculates the proper charging power of the power battery and informs a charger to output the charging power in real time, and meanwhile, the BMS controls the system to work to cool the power battery;
after the power battery is fully charged, the BMS patrols the temperature of the power battery, and when the temperature of the power battery is reduced to be lower than T1, the BMS starts the heater to start heating;
after the power battery is fully charged, if the temperature of the power battery is higher than T2, the BMS control system cools the power battery;
when the vehicle stops running, if the temperature of the power battery is lower than T1, after the charging is started, the BMS calculates the proper charging power of the power battery and informs a charger to output the charging power in real time, and meanwhile, the BMS controls the system to work to heat the power battery, so that the temperature of the battery quickly reaches the optimal performance temperature;
after the power battery is fully charged, the BMS patrols the temperature of the power battery, and when the temperature of the power battery is reduced to be lower than T1, the BMS starts the heater to start heating;
after the power battery is fully charged, if the temperature of the power battery is higher than T2, the BMS control system starts to cool the power battery, and a charger is started to supplement power for the power battery;
wherein, (T1, T2) is the optimal temperature range for power battery performance;
the method specifically comprises the following steps:
when the vehicle stops running, after a user inserts a charging gun for charging, the expected vehicle using time CAN be set through a user terminal, the BMS calculates the proper charging power of the power battery according to the most proper charging power curve at different temperatures, and informs the charger to output the charging power in real time through a charging guide circuit and a charging CAN network, meanwhile, the BMS control system works to cool the power battery, so that the temperature of the power battery quickly reaches the optimal performance temperature, and in the cooling process, the BMS adjusts the charging power in real time according to the preset curve and informs the charger to output the charging power in real time so as to quickly fill the power; the whole vehicle is in a dormant state after full power to reduce power consumption, and the BMS and the vehicle-mounted terminal are in a low power consumption mode;
after the power battery is fully charged, if the current time does not reach the user-set vehicle using time, the BMS patrols the temperature of the power battery, when the temperature of the power battery is reduced to be below T1, the BMS starts the heater to start heating, and when the heating power consumption reaches 5% of the capacity of the power battery, the BMS starts the charger to supplement the power battery; controlling the charging time to be delta t (vehicle using time-current time), the charging capacity to be 5% of the capacity of the power battery, calculating to obtain charging power P1, and adding the power consumption power P2 of the heater to obtain total charging power P;
after the power battery is fully charged, if the temperature of the power battery is higher than T2, the BMS controls the whole system to cool the power battery, and a charger is started to supplement power for the power battery;
when the vehicle stops running, if the temperature of the power battery is less than T1, after a user inserts a charging gun for charging, the expected vehicle using time CAN be set through a user terminal, after the charging is started, the BMS calculates the proper charging power of the power battery according to the most proper charging power curve at different temperatures, and informs the charger to output the charging power in real time through a charging guide circuit and a charging CAN network, meanwhile, the BMS control system works to heat the power battery, so that the temperature of the battery quickly reaches the optimal performance temperature, during the temperature rising process, the BMS adjusts the charging power according to the preset curve in real time and informs real-time output to quickly fill the power, after the power is full, the whole vehicle sleeps to reduce the power consumption, and the BMS and the vehicle-mounted terminal are in a low power consumption;
after the power battery is fully charged and the current time does not reach the vehicle using time set by a user, the BMS patrols the temperature of the power battery, starts the heater to heat when the temperature of the power battery is reduced to be below T1, and starts the charger to supplement the power battery after the heating power consumption reaches 5% of the capacity of the power battery; controlling the charging time to be delta t (vehicle using time-current time), the charging capacity to be 5% of the battery capacity, calculating to obtain charging power P1, and adding the power consumption power P2 of the heater to obtain total charging power P;
after the power battery is fully charged, if the temperature of the power battery is higher than T2, the BMS control system starts to cool the power battery, and starts a charger to supplement power for the power battery.
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| CN201711396058.2A CN108146269B (en) | 2017-12-21 | 2017-12-21 | Method for performing high-low temperature charging and thermal management on electric vehicle battery |
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| CN201711396058.2A CN108146269B (en) | 2017-12-21 | 2017-12-21 | Method for performing high-low temperature charging and thermal management on electric vehicle battery |
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| CN108146269A CN108146269A (en) | 2018-06-12 |
| CN108146269B true CN108146269B (en) | 2021-05-04 |
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| CN108749513B (en) * | 2018-06-13 | 2023-07-04 | 上海加冷松芝汽车空调股份有限公司 | Electric motor car thermal management system |
| JP7221639B2 (en) * | 2018-10-09 | 2023-02-14 | サンデン株式会社 | Vehicle air conditioner |
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